Free Deployment Dynamics of a Z-Folded Solar Array

This paper investigates the deployment dynamics of a CubeSat solar array structure with a large number (seven) of z-folded panels. The panels are connected with independent (unsynchronized) flexure hinges that allow a broad range of deployment paths, including those with self-contact. The dynamics of deployment were modeled with finite elements and measured experimentally with a commercial photogrammetric system. Testing showed a variance in the deployment path but a consistent deployed distance versus time. Though the deployment path varied, general tendencies were noted: the array consistently turned after deploying outward and in some cases intersected the array panels near the test stand. More than six panels unacceptably increases the risk of self contact during deployment. The finite element model successfully approximated the deployed distance versus time, while the finite element deployment path differs slightly from the experimentally determined range.